# your code goes here
import math
N=int(input())
B=int(input())
a=[float(i) for i in input().split()]
pa=[0.0]*N
d=0.0
for i in range(N):
    dn=1.0
    pa[i]=a[i]
    j=a[i]-1
    dn=B**j
    dn*=pa[i]
    d+=dn
print(d)
d=0.0
for i in range(N):
    dn=1.0
    if pa[i]==-1 or pa[i]==0:
        pa[i]=1
    else:
        pa[i]+=1
        pa[i]=1/pa[i]
    if a[i]==-1:
        dn=math.log(B)
    else:
        j=a[i]+1
        dn=B**j
    dn*=pa[i]
    d+=dn
print(d)